Flexible sleeve for stay-bolts.



A. G. RUBER & C. H. PORTER.

FLEXIBLE SLEEVE FOR STAY sous.

IIVI/ENTORS 0202'? G fia er I pomar" W ATTORNEYS Patentei May 8, 1917.

LQQEQ-E o WITNESSES UNTTE TATES PATENT @FFTQE.

ANTON G. HUBER AND CLARENCE H. PORTER, OF ALBANY, NEW YORK.

FLEXIBLE SLEEVE FOR STAY-BOLTS.

Application filed September 17, 1915.

To all whom 2'25 ma e concern:

Be it known that we, ANTON Gr. RUBER and CLARENCE H. Pon'rnn, citizens of the United States, and residents of Albany, in the county of Albany and State of New York, have invented a new and Improved Flexible Sleeve for Stay-Bolts, of which the following is a full, clear, and exact description.

Our invention relates to sleeves used in connection with stay bolts, and particularly stay bolts of the kind used in boilers where the changes due to expansion and contraction of the various parts of the boiler are apt to subject different parts of the boiler to undue strains, and thus tend to cause leakage.

More particularly stated our invention comprehends a sleeve to be connected with a stay bolt, the sleeve having such structure as to enable it to be slightly flexed or distorted by the pull of the stay bolt or in consequence of the aforesaid expansion and contraction due to changes in temperature.

Reference is made to the accompanying drawings forming a part of this specification and in which like characters indicate like parts.

Figure 1 is a section showing a stay bolt having connected with its end portions a pair of our improved sleeves, which in this instance are of slightly different form;

Fig. 2 is an end elevation of the sleeve shown at the left of Fig. 1;

Fig. 3 is a side elevation of the sleeve shown at the left of Fig. 1; and

Fig. 4 is a central section through another form of sleeve made in accordance with our invention.

The boiler walls are shown at 5 and 6; and extending through the wall 5 is a sleeve 7 threaded externally and provided with a head 8. This head has an angular portion 9 to be engaged by a wrench, in order that the sleeve may be turned. The head 8 is provided with a centrally disposed hole 10 threaded internally. The sleeve 7 is further provided with a web 11 having in longitudinal section, as shown in Fig. 1, a substantially S shape. This portion 11 is of greater diameter than the threaded portion of the sleeve, and has a cross diameter which varies so as to render it somewhat thinner than other portions of the sleeve, whereby the resiliency and flexibility of the sleeve is increased. A bolt 11 is provided adjacent Specification of Letters Patent.

Patented May 8, 191?.

Serial No. 51,146.

its ends with threaded portions 12 and 13, the threaded portion 12 being inserted through the threaded hole 10. Another sleeve 14, of a type slightly different from the sleeve 7, is shown at the right of Fig. 1 and is connected with the threaded portion 13 of the bolt 11 The sleeve 14 is provided with a head 15, the latter having an angular portion 16 for facilitating the application of a wrench. The sleeve 14 is further provided with a web portion 17 similar to the portion 11 of the sleeve 7 above described. The sleeve 14 is further provided with a flange 18 integral with it and having a gen eral annular form. This flange is separated from the web 17 by an annular slot 20. The flange 18 serves as a brace; and if the head 15 be forced beyond certain limits to the right, according to Fig. 1, the flange 18 is engaged by the adjacent portion of the web 17, and thus serves the purpose of a limit ing stop. The slot 20 merges into an annular passage 30 with which the sleeve 14 is provided. By virtue of this passage the available flexible portion of the web 17 is increased in area from what it would be if the passage 30 were omitted, and the sleeve, therefore, possesses a maximum of flexibility and resiliency. The sleeve 7 is provided with a passage 21 extending to the head 8, the sleeve 14 being provided with a similar passage 22 extending to the head 15.

In the form shown in Fig. 4 the sleeve appears at 23 and is provided with a head 24 and with a web portion 25 similar to the web portion 11 above described. The sleeve shown in Fig. 4 is provided with a portion 26 of angular form; and extending through this portion and through the head 24 is a hole 27 threaded internally. The sleeve is further provided with a slot 28 of annular form, extending entirely around it. By the existence of this slot the web portion 25 is continued some distance inward, as will be understood from Fig. 4, the flexibility and resilience of the web portion 25 being increased correspondingly.

We do not limit ourselves to the precise construction shown, as variations may be made therefrom without departing from the spirit of our invention and as defined in the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is as follows:

1. A flexible sleeve for stay bolts, provided at one end With means for securing it to a boiler Wall and at the other end'with a head adapted to receive a Wrench and having a threaded opening, a flexible Web adjacent the head and an annular passage a slot leading from the passage out throughthe enlargement and separating the enlarge ment from the Web, Wherebythe resiliency of the Web is increased and the enlargement made to serve as a limiting stop.

3. A device of the character described comprising,-a member provided With a passage and threaded externally, a Web portion integral With said member and having a flexible Wall, a head carried by said Web and provided With an opening threaded internally and merging into said passage for the purpose of recelv ng a stay bolt, and a member earned by sald threaded portion and extending into proximity to said Web I portion for the purpose of engaging the Web portion to serve as a limiting stop for the same.

4. A flexible sleeve for stay bolts, having one end provided With a threaded opening, the bore of the sleeve being enlarged adja- V 7 names to this specification in the presence of tWo subscribing Witnesses. V

ANTON G. HUBER. CLARENCE H. PORTER-q Witnesses:

LESTER T. HUBBARD,

ELIZABETH Gr. CONNORS. I

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. V a 

